# Petal Layout Pro — Sphere & Head Development

> Calculates petal layouts for spherical and hemispherical heads for fabrication. (iPhone/iPad app by Imran Pinjara.)

- Source: https://appshunter.io/ios/app/petal-layout-pro/id1486823832 (this page in markdown: same URL + `.md`)
- Developer: [Imran Pinjara](https://appshunter.io/developer/1484488781)
- Category: Productivity, Utilities
- Price: $3.99
- Age rating: 4+
- Requires: iOS 16.1 · 1 MB
- Languages: American English
- Released: 2019-11-07
- Data updated: 2026-08-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/petal-layout-pro/id1486823832/reviews.md

## What is Petal Layout Pro?

Petal Layout is a professional fabrication calculator for developing petal-type layouts for spheres and hemispherical heads. It is designed for pressure vessel fabrication, process equipment manufacturing, spherical tank fabrication, and industrial sheet metal work.

The app generates fabrication-ready layout dimensions that can be used for marking plates or sheet metal before cutting, forming, and assembling spherical or hemispherical components.

Whether you are a fabrication engineer, fitter, workshop technician, production engineer, or pressure vessel professional, Petal Layout helps simplify complex petal development calculations and improves accuracy during fabrication.

Supported Petal Layouts

• Hemispherical Head / Hemi Head
• Hemispherical Dish End
• Sphere / Spherical Tank

Hemispherical Head Petal Layout

Generate petal development dimensions for hemispherical pressure vessel heads and dish ends.

Enter the required head diameter and straight face length, select the desired number of development divisions, and calculate the layout dimensions required for plate marking.

Sphere Petal Layout

Generate petal-type development dimensions for spherical tanks and spherical shells.

Enter the sphere diameter and select the required number of divisions to generate the layout dimensions for fabrication.

Development Options

Choose from predefined development divisions:

• 12 Parts
• 24 Parts
• 36 Parts
• 48 Parts

You can also enter a custom number of development divisions according to your fabrication requirements.

Features

• Sphere petal layout development
• Hemispherical head petal development
• Dish end petal layout
• Spherical tank layout calculations
• Multiple development division options
• Custom development line/part count
• Fabrication-ready marking dimensions
• Clear and easy-to-understand results
• Simple professional interface
• Metric and Imperial unit support
• No internet connection required

Fabrication Applications

Petal Layout is useful for:

• Pressure Vessel Fabrication
• Spherical Tank Fabrication
• Process Equipment Fabrication
• Storage Tank Manufacturing
• Dish End Fabrication
• Hemispherical Head Fabrication
• Sheet Metal Fabrication
• Industrial Fabrication
• Plate Layout and Marking

Designed For

• Fabrication Engineers
• Fabrication Fitters
• Production Engineers
• Mechanical Engineers
• Workshop Technicians
• Pressure Vessel Fabricators
• Tank Fabricators
• Process Equipment Manufacturers
• Fabrication Supervisors
• Engineering Students

For improved fabrication accuracy, the app can be used with appropriate mean dimensions when developing and marking petal layouts.

Petal Layout provides a convenient solution for generating sphere and hemispherical head petal development dimensions, helping reduce manual calculations, save fabrication time, and improve accuracy during plate layout and marking.

## Key features

- Sphere petal layout calculation
- Hemispherical head petal layout calculation
- Multiple part divisions (12, 24, 48)
- Unit setting for mm/inches
- Flat pattern development
- Supports pressure vessel fabrication

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/petal-layout-pro/id1486823832/reviews.md

### 1/5 — Frod App. Need refund

*2020-08-15*

Description says it include ellipsoidal D’end however it is only hemi head and spherical head. Need refund.

## Frequently asked questions about Petal Layout Pro

### What types of heads can Petal Layout Pro calculate layouts for?

Petal Layout Pro can calculate petal layouts for both Hemispherical Heads and Sphere shapes. This is essential for the flat pattern development required in fabricating these components for pressure vessels and storage tanks.

### What are the different layout options available in Petal Layout Pro?

Petal Layout Pro offers three options for petal layout development: 12 parts, 24 parts, and 48 parts. These divisions allow for varying levels of precision in the fabrication layouts.

### Can I use Petal Layout Pro with both metric and imperial units?

Yes, Petal Layout Pro provides unit setting options, allowing you to choose between millimeters (mm) and inches for your calculations. This flexibility ensures it can be used in various fabrication environments.

### What input dimensions are required for Petal Layout Pro?

For Hemispherical Head layouts, you need to input the head or dish end diameter and the straight face in mm. For Sphere layouts, you only need to enter the diameter in mm.

### Is Petal Layout Pro suitable for offline use?

The provided data does not specify if Petal Layout Pro supports offline use. However, as a calculation utility, it is likely designed to function without an internet connection once installed.

### How often is Petal Layout Pro updated?

Petal Layout Pro was last updated on May 30, 2023, with its latest version being 2.0. This indicates a reasonable update frequency for a utility application.

### What is the age rating for Petal Layout Pro?

Petal Layout Pro has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals who may be learning about fabrication.

### Does Petal Layout Pro have ads?

No, Petal Layout Pro does not contain advertisements. It is a paid application, and the absence of ads contributes to a cleaner user experience during fabrication calculations.

## Version history (last 3 releases)

### 3.0 — 2026-08-19

Upgraded to latest SDK Support.
Changes in App UI/UX.
Added Unit Setting Option with unit handling.
Removed Decimal Fraction Chart.
Added Fractional Input Support.
Added Decimal and Fractional Both Support.
Improved Input Field for Proper Labeling and Placeholders.
Improved Calculation Speed.
Added Unit Display on Result Data.
Fix minor Bugs and Issues.

### 2.0 — 2023-05-30

Unit Setting Option for mm/inches added.
decimal fraction chart added.
keyboard dismiss issue resolved.
App Upadet for Higher SDK Level for latest version support.
App Theme Changed.
App UI Design Changed
App Navigation Changed.
fix app stability and performance issue.
improve user experience.
fix minor bugs.

### 1.0 — 2019-11-07

No release notes.

## More apps by Imran Pinjara

- [Screw Flight Pro](https://appshunter.io/ios/app/screw-flight-pro/id1484488782)
- [Miter Bend Pro](https://appshunter.io/ios/app/miter-bend-pro/id1484821889)
- [Flange Hole Marker Pro](https://appshunter.io/ios/app/flange-hole-marker-pro/id1486290745)
- [Pressure Vessel Heads Pro](https://appshunter.io/ios/app/pressure-vessel-heads-pro/id1486607999)
- [Pump Calculator](https://appshunter.io/ios/app/pump-calculator/id1487084383)

All apps by Imran Pinjara: https://appshunter.io/developer/1484488781

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*